Matthew,
Continue working on getting a consistent tone throughout your playing. This week focus on your breathing–making sure you take a full breath before you play and releasing it straight away (golf-swing breath).
Work on Sweet Hour of Prayer in regards to your sound. Pretend you’re playing in a big church and people sitting in the very back have to hear you. Remember rhythmic accuracy!!
What a wonderful world–try to convey the song through your trombone. You don’t have the advantage of using words so your sound has to tell the story! What a wonderful world
Work on getting at least three 15-minute practice sessions in this week. The more you play, the faster your sound will improve!